| 초록 |
Chlor-alkali (CA) membrane process is a commercially useful process to produce valued chemicals such as chlorine, sodium hydroxide and hydrogen via salined water electrolysis using sodium ion (Na+)-selective membranes. The most important issue in CA process is to reduce high energy consumption. A plausible solution is to obtain highly Na+-conductive membranes. The representative membrane materials are chemically stable perfluorinated sulfonic acid (PFSA) ionomers such as Nafion and Flemion. PFSA membranes, however, have high production cost and weakness to radical attack under CA operation conditions. Thus, it is necessary to develop alternatives to PFSA membranes. This study provides a polymeric design concept for a desirable CA membrane formation. For this, a sulfonated poly(arylene ether sulfone) copolymer membrane is radiation-grafted with a highly sulfonated poly(styrene) used as a side chain material. |
